Invariants
| Base field: | $\F_{83}$ |
| Dimension: | $2$ |
| L-polynomial: | $( 1 - 6 x + 83 x^{2} )( 1 + 83 x^{2} )$ |
| $1 - 6 x + 166 x^{2} - 498 x^{3} + 6889 x^{4}$ | |
| Frobenius angles: | $\pm0.393189690303$, $\pm0.5$ |
| Angle rank: | $1$ (numerical) |
| Jacobians: | $480$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $2, 3$ |
This isogeny class is not simple, primitive, not ordinary, and not supersingular. It is principally polarizable and contains a Jacobian.
Newton polygon
| $p$-rank: | $1$ |
| Slopes: | $[0, 1/2, 1/2, 1]$ |
Point counts
Point counts of the abelian variety
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $6552$ | $49533120$ | $327672262008$ | $2251490324428800$ | $15515549579177319672$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $78$ | $7186$ | $573066$ | $47441422$ | $3938915838$ | $326941027234$ | $27136058410266$ | $2252292222392158$ | $186940255162645998$ | $15516041187385478386$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 480 curves (of which all are hyperelliptic):
- $y^2=41 x^6+17 x^5+33 x^4+8 x^3+25 x^2+25 x+26$
- $y^2=35 x^6+59 x^5+8 x^4+20 x^3+8 x^2+59 x+35$
- $y^2=56 x^6+37 x^5+72 x^4+72 x^3+76 x^2+23 x+55$
- $y^2=30 x^6+54 x^5+77 x^4+69 x^3+72 x^2+5 x+28$
- $y^2=56 x^6+13 x^5+14 x^4+66 x^2+45 x+20$
- $y^2=6 x^6+70 x^5+9 x^4+17 x^3+9 x^2+70 x+6$
- $y^2=52 x^6+27 x^5+25 x^4+79 x^3+58 x^2+4 x+5$
- $y^2=80 x^6+50 x^5+34 x^4+69 x^3+36 x^2+9 x+43$
- $y^2=82 x^6+74 x^5+x^4+81 x^3+21 x^2+60 x+16$
- $y^2=42 x^6+29 x^5+32 x^4+61 x^3+75 x^2+73 x+1$
- $y^2=10 x^6+20 x^5+47 x^4+12 x^3+80 x^2+7 x+54$
- $y^2=82 x^6+5 x^5+39 x^4+53 x^3+46 x^2+76 x+8$
- $y^2=81 x^6+4 x^5+10 x^4+52 x^3+13 x^2+28 x+61$
- $y^2=82 x^6+67 x^5+12 x^4+37 x^3+22 x^2+71 x+46$
- $y^2=79 x^6+30 x^5+2 x^4+9 x^3+51 x^2+32 x+69$
- $y^2=58 x^6+30 x^5+52 x^4+26 x^3+41 x^2+19 x+77$
- $y^2=42 x^6+74 x^5+47 x^4+62 x^3+62 x^2+14 x+59$
- $y^2=2 x^6+34 x^5+3 x^4+6 x^3+42 x^2+14 x+46$
- $y^2=74 x^6+80 x^5+52 x^4+50 x^3+36 x^2+32 x+51$
- $y^2=11 x^6+17 x^5+44 x^4+65 x^3+9 x^2+56 x+12$
- and 460 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{83^{2}}$.
Endomorphism algebra over $\F_{83}$| The isogeny class factors as 1.83.ag $\times$ 1.83.a and its endomorphism algebra is a direct product of the endomorphism algebras for each isotypic factor. The endomorphism algebra for each factor is: |
The base change of $A$ to $\F_{83^{2}}$ is 1.6889.fa $\times$ 1.6889.gk. The endomorphism algebra for each factor is:
|
Base change
This is a primitive isogeny class.
Twists
Below is a list of all twists of this isogeny class.
| Twist | Extension degree | Common base change |
|---|---|---|
| 2.83.g_gk | $2$ | (not in LMFDB) |